Degree plan Charter Oak with goal of Georgia Tech OMSCS

[Merlin]

#2 Out of curiosity, would you know how other(non-big3) schools might treat our/my COSC transcript if they are full of ACE credits?
For example, if i took "Study.com - Math 108: Discrete Mathematics" & "Sophia.org - Intro to Statistics", will it likely get accepted as a complete credit in other schools if transited via COSC? (Ie. ACE credit > COSC > Oregon State University)

It depends on the target school. Some accept ACE credits and some do not. If the school doesn't accept ACE credits normally then they may have troubles with it... particularly if those classes are prerequisites for other courses. For a master's degree, as long as you have a valid bachelor's degree, the admissions team will probably only care about courses taken in the core subjects.

Since your end goal is to complete a master's degree in computer science (such as the OMSCS), I'd recommend that you pick up the core CS courses from a regionally accredited college if you want to have the best chance of being accepted. Ideally, those should be graded credits at a B or higher grade level, since they will want to be able to see that you have sufficient technical and math background to support a CS curriculum.

FYI, there are others on the forum that have completed bachelor's degrees using ACE credits and applied to grad school only to be accepted on the condition that they complete leveling courses (retaking the core undergrad courses) at a minimum GPA to qualify. Rather than having to do the work (and pay) twice, you may want to just bite the bullet and get those done at OSU or wherever you prefer. It can even be community college as long as its proper college credit.

For admission to an MSCS degree, a BACS/BSCS usually isn't required, but most colleges will probably require successful applicants to have completed undergrad courses in Algorithms, Data Structures, Calculus (2 or 3 semesters worth), Discrete Math, Linear Algebra, Probability/Statistics, and an object-oriented programming course along with at least one programming language. I wasn't able to find the specific list that GA Tech requires, but those are probably pretty close. Some schools may waive certain requirements if you can provide academic certificates, or a resume or portfolio, that shows you've developed those skills elsewhere, but I don't know how often that happens.

Since your end goal is the OMSCS, you should drop a line to the school admissions department and ask what the specific requirements or recommended courses are.